Английский Этимологический словарь - saw (1)

- "cutting tool," O.E. sagu, from P.Gmc. *sago, from PIE base *sak-/*sek- "cut." The verb is from M.E. Sawbones "surgeon" is 1837 slang; sawdust is 1530; sawfish first attested 1664. Sawbuck "ten-dollar bill" is 1850, from resemblance of X (Roman numeral 10) to the ends of a sawhorse.